CN104790533B - Fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment - Google Patents
Fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment Download PDFInfo
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- CN104790533B CN104790533B CN201510207856.0A CN201510207856A CN104790533B CN 104790533 B CN104790533 B CN 104790533B CN 201510207856 A CN201510207856 A CN 201510207856A CN 104790533 B CN104790533 B CN 104790533B
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- self limiting
- temperature heat
- heat tape
- tie hoop
- limiting temperature
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Abstract
Fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment, and step is：1st, complete to wind self limiting temperature heat tape on the connection reinforcing bar after Jiang Mao lap-joints connect reinforcing bar, reinforcing cage stirrup and tie hoop installation and welded in tie hoop by design, then assembly concrete component is poured, self limiting temperature heat tape is embedded in concrete；2nd, in surface of concrete structure covering insulation material after component in-site installation；3rd, self limiting temperature heat tape electrified regulation is poured into grouting material in backward tie hoop in 10 minutes, grouting material and concrete component is kept 45 ± 5 DEG C of maintenance 30min~72h hardening using the electric heating of self limiting temperature heat tape.The construction method is directly heated using self limiting temperature heat tape to grouting material, it can be ensured that grouting material does not freeze, homogeneous heating, and the thermal efficiency is high, reduces influence of the environment temperature to construction quality；Construction method is simple, safety, is not limited by building height and structure size.
Description
Technical field
The present invention relates to building structural member, fabricated construction preformed hole starches anchor lapping construction under particularly a kind of low temperature environment
Method.
Background technology
The technology that preformed hole slurry anchor overlap joint is used when being a kind of safer reliable prefabricated assembled component connection.The party
Method be lower floor's wall top surface it is reserved with vertical applied force bar gauge and the same number of joint bar in wall, correspondingly, upper
The hole that inwall is corrugated or helical form rough surface is reserved in layer wall.Upper wall install it is in place after, by with hole
Grout hole and steam vent that hole is connected, grouting material is injected into hole, and grouting material is condensed after hardening, and upper and lower layer wall is connected
Connect and be integrally formed.This connected mode it is crucial that to prevent anchorage zone from occurring along reinforcing bar side while anchorage length is ensured
To the adverse effect produced by crack.According to《Prefabricated concrete structure technical regulation》(JGJ1-2014), during grouting, day puts down
Uniform temperature is not lower than 5 DEG C.As environment temperature is less than the lowest construction temperature of cement-based grouting material requirement or needs to accelerate
During gain in strength, mostly conserved at present using Heat artificially mode, such as steam curing method, brooder method, electric blanket method, iodine-tungsten lamp method
Etc..
The northern area of China winter temperature is down to less than 0 DEG C (i.e. subzero temperature), using this construction method, works as assembled architecture
When structure level number is higher, component is larger, manually heating curing is very inconvenient, and is affected by human factors, and heating-up temperature is difficult
Control it stable, once temperature decrease, grouting material easily freezes in hardening process, influence strength development, construction quality
It also is difficult to ensure.
The content of the invention
It is an object of the invention to provide one kind do not limited by depth of building and component size, easy construction, can maximum limit
Fabricated construction preformed hole slurry anchor lapping construction method under the low temperature environment that degree reduction environment temperature influences on construction quality.
To achieve the above object, fabricated construction preformed hole slurry anchor lapping construction side under the low temperature environment that the present invention is provided
Method, comprises the following steps：
Step 1, prefabricated components
The connection reinforcing bar, reinforcing cage stirrup and tie hoop for completing preformed hole Jiang Mao lap-joints by design are installed and welded
Afterwards；Self limiting temperature heat tape is wound on the connection reinforcing bar in tie hoop, and is fixed with fixing band, self limiting temperature electrical heating
Winding scope of band etc. is higher than tie hoop；Then assembly concrete component is poured, notes making self limiting temperature electrical heating when pouring
Band is embedded in concrete, does not allow to expose from concrete；
Step 2, the prefabricated components completion in-site installation by step 1, are then covered on the surface of assembly concrete component
Insulation material；
Step 3, self limiting temperature heat tape is connected with power supply, is then electrified to heating and poured in backward tie hoop for 10 minutes
Grouting material, the temperature for making grouting material and assembly concrete component using the electric heating of self limiting temperature heat tape is kept for 45 ± 5 DEG C, is filled
Slurry conserves 30min~72h hardening at this temperature, completes fabricated construction preformed hole slurry anchor lapping construction under low temperature environment.
Compared with prior art, it is an advantage of the invention that：
1st, grouting connecting portion is directly heated using self limiting temperature heat tape, it is ensured that grouting material is closed at 45 ± 5 DEG C
Under the conditions of conserved, grouting material will not freeze, and curing temperature is stable, and the work caused by environment temperature is low is reduced to greatest extent
Journey quality problems.
2nd, self limiting temperature heat tape is evenly arranged in tie hoop grouting junction, and directly grouting connecting portion is added
Heat, homogeneous heating, the thermal efficiency is high.
3rd, construction method is simple, safety, is not limited, can made in any job site by building height and structure size
With.
Brief description of the drawings
Fig. 1 is the longitudinal section view of fabricated construction preformed hole Jiang Mao lap-joints node prepared using construction method of the present invention
Figure；
Fig. 2 for along along Fig. 1-transverse sectional view at tie hoop position.
In figure：1- connection reinforcing bars, 2- reinforcing cage stirrups, 3- self limiting temperature heat tapes, 4- tie hoops, 5- assembled coagulations
Native component, 6- insulation materials, 7- power supplys.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
The present embodiment is that three groups are amounted to 9 beams in Shenyang Building Univ.'s structure laboratory (laboratory's temperature is -14 DEG C)
The preformed hole slurry anchor overlap joint grouting experiment that post component node is carried out, experimental procedure is as follows：
Step 1, assembling and welding by connection reinforcing bar 1, steel reinforcement cage 2 and tie hoop 4 at design requirement completion node, so
DBR-J type self limiting temperatures heat tape 3, self limiting temperature electricity are wound on the connection reinforcing bar 1 in tie hoop afterwards uniform consolidation
Winding scope of heating tape etc. is higher than tie hoop (self limiting temperature heat tape can not influence grouting material to be poured into a mould into tie hoop)；
Then assembly concrete component 5 is poured, notes making self limiting temperature heat tape be embedded in concrete when pouring, is not allowed from mixed
Expose in solidifying soil；
Step 2, the position covering corresponding with tie hoop on the surface of assembly concrete component are made up of cotton-wadded quilt
Insulation material 6；
Step 3, the front end of self limiting temperature heat tape is connected with 220V AC powers 7, after being then electrified to heating 10 minutes
CGMJM-VIII type grouting materials are poured into a mould into tie hoop with grouter, the electric heating using self limiting temperature heat tape makes tie hoop
The temperature of interior grouting material and concrete component is maintained at 50 DEG C, conserves 24h, completes fabricated construction preformed hole under low temperature environment and starches
Anchor lapping construction.
The grouting material and coagulation of the 9 beam column component nodes completed using nonmetallic ultrasound measuring instrument and forcing press to experiment
Native component is detected that its compactness reaches construction technical requirement.
Claims (1)
1. fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment, the fabricated construction preformed hole starches anchor
Overlap as beam column component node preformed hole slurry anchor overlap joint, it is characterised in that comprise the following steps：
Step 1, by design requirement complete node at connect reinforcing bar（1）, steel reinforcement cage（2）And tie hoop（4）Assembling and welding,
Then in the connection reinforcing bar in tie hoop（1）Wind DBR-J type self limiting temperature heat tapes upper uniform consolidation（3）, from
Winding scope of the warm heat tape of limit etc. is higher than tie hoop；Then assembly concrete component is poured（5）, note making when pouring
Self limiting temperature heat tape is embedded in concrete, does not allow to expose from concrete；
The insulation that step 2, the position covering corresponding with tie hoop on the surface of assembly concrete component are made up of cotton-wadded quilt
Material（ 6）；
Step 3, by the front end of self limiting temperature heat tape and 220V AC powers（7）Connection, is used after being then electrified to heating 10 minutes
Grouter pours into a mould CGMJM- into tie hoopType grouting material, the electric heating using self limiting temperature heat tape makes tie hoop
The temperature of interior grouting material and concrete component is maintained at 50 DEG C, conserves 24h, completes fabricated construction preformed hole under low temperature environment and starches
Anchor lapping construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207856.0A CN104790533B (en) | 2015-04-27 | 2015-04-27 | Fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510207856.0A CN104790533B (en) | 2015-04-27 | 2015-04-27 | Fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104790533A CN104790533A (en) | 2015-07-22 |
| CN104790533B true CN104790533B (en) | 2017-10-13 |
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| CN201510207856.0A Active CN104790533B (en) | 2015-04-27 | 2015-04-27 | Fabricated construction preformed hole starches anchor lapping construction method under a kind of low temperature environment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685390A (en) * | 2019-10-24 | 2020-01-14 | 天一建设发展有限公司 | Construction method of building wall |
| CN115075564B (en) * | 2022-07-01 | 2023-03-31 | 北京城建七建设工程有限公司 | Device suitable for prefabricated wallboard winter stage grout local heating keeps warm of assembled |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2852166B2 (en) * | 1992-12-17 | 1999-01-27 | 株式会社フジタ | Method for preventing freezing of grout material during PC member installation bonding |
| DE10002367C1 (en) * | 2000-01-20 | 2001-07-19 | Hilti Ag | Long pot life mortar acting by rapid frontal polymerisation is used e.g. for fixing metal rods in concrete and comprises polymerizable monomers and/or hardenable resins with heat-activated initiators or accelerators |
| JP4559203B2 (en) * | 2004-12-02 | 2010-10-06 | オリエンタル白石株式会社 | Electrothermal curing structure of prestressed concrete members. |
| CN102092089B (en) * | 2010-12-15 | 2012-04-04 | 中国建筑第二工程局有限公司 | Heating wire heating device and construction method for winter concrete |
| CN102296821A (en) * | 2011-07-12 | 2011-12-28 | 中国十七冶集团有限公司 | Construction method for heating curing of reinforced concrete resistance wire under low-temperature condition |
| CN102642244B (en) * | 2012-04-10 | 2015-07-08 | 中南大学 | Reinforced concrete structure curing device in low-temperature environment |
| CN102900168B (en) * | 2012-10-08 | 2014-08-20 | 沈阳建筑大学 | Splitting and assembling structure and assembling connecting method of assembled type concrete frame-shear wall |
| CN102935658A (en) * | 2012-11-08 | 2013-02-20 | 沈阳建筑大学 | Method and device for concrete electrical heating maintenance |
| JP5493032B1 (en) * | 2013-05-01 | 2014-05-14 | 黒沢建設株式会社 | Grout cold curing method |
| CN104153461A (en) * | 2013-05-16 | 2014-11-19 | 叶新 | Precast concrete structural member and method for building construction longitudinal connection between structural members |
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